ORP probe with ADS1115
PawelSmierciak 2024-02-28 09:06:31 173 Views2 Replies hello
maybe someone could provide me some details how to calculate ORP with above hardware and esp32
some part of my code:
ads.setGain(GAIN_ONE);
ads.begin();
orp_voltage = ads.readADC_SingleEnded(ORP_PIN) / 10;
how to calculate ORP level ?
right now i do it like this
ORP = (orp_voltage / 5*1024)/1000;
but im not sure is it the good way
problem solved ;-) short description and code for ADS1115 + SEN0464
first you need to calibrate ;-) more info on the webpage :
https://wiki.dfrobot.com/Gravity_Analog_ORP_Sensor_PRO_SKU_SEN0464
most important part:
Remove the ORP probe and use wire to short-circuit the S+ and S- pins of the ORP signal converter
use below code to read calibration value :
Adafruit_ADS1115 ads;
ads.setGain(GAIN_ONE);
ads.begin();
voltage = ads.readADC_SingleEnded(ORP_PIN);
//you will have calibration value
calibration = voltage * 0.125;
and you will use it in your program to read data :
Adafruit_ADS1115 ads;
ads.setGain(GAIN_ONE);
ads.begin();
voltage = ads.readADC_SingleEnded(ORP_PIN);
orp = voltage * 0.125;
orp = orp - calibration;
PawelSmierciak 